The new update has some bug fixes and usability improvements. I also added the option to run Altitude Prediction calculations with zero drag.

I’m working on another update to the Altitude Prediction calculator that will use altitude and temperature to compute air density. Currently a static air density value is used. I’m also adding motor and body tube lookups to the main Altitude Prediction screen so they can be run without having to access the data assistant screen first.

I added a body tube look-up feature to the Altitude Prediction calculator. There is a new button on the Data Assistant screen which will provide a list of tubes to pick from. After selecting a body tube, the tube’s diameter and area will be populated back to the Data Assistant screen. I’m currently working on motor selection option, which should be finished soon.

This update adds a few new features to the altitude prediction calculator. It will display the motor class percentage and thrust to weight ratio once a calculation is made. If the thrust to weight ratio is more than five the display is green. If less than five it is red. It will warn if the thrust ratio is less than five.

Since this calculator assumes a static drag coefficient, it will warn the user if the flight is transonic. Once a flight becomes transonic, the drag coefficient increases rapidly. For transonic flights, a static Cd could result in less accurate results.

The two warnings can be enabled or disabled by the user from the app settings.